A visual inspection device for defects in the industrial processing of sealing rings

Abstract

This invention discloses a visual inspection device for defects in the industrial processing of sealing rings, relating to the field of sealing ring inspection technology. It includes an inspection table with a slide rail, an inspection camera, and a rotatably connected support plate on top. The support plate has a horizontal expansion component on top, containing four transverse blocks and a lifting block. An internal rising and rotating assembly drives the expansion rotation. The support plate also has a rolling face-changing component on top, containing four sliding rods and a pressure block. An internal elastic blocking assembly enables intermittent face-changing of the sealing ring body. This device uses four conical transverse blocks to form an expandable conical column, allowing sealing rings of different inner diameters to adaptively slide down to a matching height. During inspection, an electric push rod drives the lifting block to expand the transverse blocks outward, exposing cracks due to elastic deformation. Simultaneously, a protrusion and a spiral groove cooperate to rotate the support plate, completing a circumferential segmental scan. The pressure block, in conjunction with a resistance column and a resistance hole, stabilizes the sealing ring during expansion and enables intermittent rolling face-changing, thus comprehensively and accurately completing visual inspection.

Description

Technical Field

[0001] This invention relates to the field of sealing ring inspection technology, specifically a visual inspection device for defects in the industrial processing of sealing rings. Background Technology

[0002] Sealing rings are suitable for hydraulic and pneumatic systems and various mechanical equipment and components. In liquid and gas media, they play a sealing role in static or dynamic states. Among the sealing rings, O-rings are the most commonly used. O-rings are the most widely used sealing components in various mechanical equipment. Their cross-sectional structure is extremely simple, and they have a self-sealing function and reliable sealing performance. They are mainly used for static sealing and reciprocating motion sealing.

[0003] O-rings are typically made from elastomers such as rubber or silicone through injection molding or compression molding. During injection molding, rubber and silicone materials are prone to internal defects such as cavitation, micropores, weld lines, or microcracks due to material flowability, poor mold cavity venting, or fluctuations in process parameters. Furthermore, because the materials themselves have low elastic modulus and uneven thermal shrinkage, coupled with the large size and complex curved surface structure of O-rings, their inner curved surfaces and root corners are susceptible to further hidden defects such as microcracks, internal delamination, or poor adhesion due to uneven internal stress, mold wear, or process fluctuations. Therefore, O-rings require quality inspection after production to remove defective products.

[0004] However, existing inspection technologies mainly rely on manual visual inspection or conventional static visual inspection. Traditional manual inspection requires repeatedly flipping the product under a magnifying glass to inspect its appearance, burrs, and defects on all sides, including the inside, outside, top, and bottom. This method is inefficient, dependent on operator experience, and cannot adapt to the pace of high-speed online production. Conventional static visual inspection only takes a single picture of the sealing ring in its natural state (without stress), and cannot identify closed, hidden defects caused by stress concentration areas such as the inner curved surface and root corners. Therefore, how to efficiently and reliably detect hidden defects formed in stress concentration areas of rubber / silicone O-rings has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The purpose of this invention is to provide a visual inspection device for defects in the industrial processing of sealing rings, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a visual inspection device for defects in the industrial processing of sealing rings, comprising an inspection table, a slide rail fixedly installed on the top of the inspection table, an inspection camera installed on the moving path of the slide rail, and a support plate rotatably connected to the top of the inspection table; The top of the support plate is provided with a horizontal expansion component, which includes four symmetrically arranged transverse blocks on the top of the support plate. A sealing ring body is sleeved on the outer side of the four transverse blocks. A conical arc surface is opened on the side of the four transverse blocks that are far apart, and a conical inclined surface is opened on the side of the four transverse blocks that are close together. A lifting block is provided in the middle of the top of the support plate. A rising and rotating assembly is provided inside the support plate so that when the sealing ring body is visually inspected, the transverse blocks drive the sealing ring body to expand and rotate through the rising and rotating assembly. The top of the support plate is provided with a rolling face-changing component, which includes four symmetrically fixed sliding rods fixed to the top of the support plate. The outer walls of the four sliding rods are slidably connected to a pressure block. The pressure block is provided with an elastic blocking component inside, so that when the sealing ring body is visually inspected, the pressure block can cause the sealing ring body to intermittently change face through the elastic blocking component.

[0007] Preferably, the rising and rotating assembly includes: A through hole is formed in the middle of the top of the support plate. A sliding groove is formed on the side of the four horizontal moving blocks that are close to each other, corresponding to the lifting block. The four extended ends of the lifting block are respectively attached to the inner wall of the sliding groove. A lifting rod is rotatably connected to the bottom center of the lifting block. The bottom of the lifting rod extends through the inner wall of the through hole into the interior of the testing platform. An electric push rod is fixedly installed inside the testing platform corresponding to the lifting rod. The bottom of the lifting rod is fixedly connected to the drive end of the electric push rod.

[0008] Preferably, the outer wall of the lifting rod is provided with vertical grooves at equal intervals, and the outer wall of the lifting rod is provided with spiral grooves at equal intervals. The vertical grooves and the spiral grooves are staggered, and the inner walls of the vertical grooves and the spiral grooves are connected and matched.

[0009] Preferably, a protrusion is fixedly connected to the inner wall of the through hole, and the outer wall of the protrusion is in contact with and slides against the inner wall of the spiral groove.

[0010] Preferably, the bottoms of the four transverse blocks are all slidably disposed on the top surface of the support plate, and the bottoms of the four transverse blocks are respectively fixedly connected to a limiting block. The top of the support plate is respectively provided with a limiting groove corresponding to the limiting block, and the outer wall of the limiting block is slidably attached to the inner wall of the limiting groove.

[0011] Preferably, the outer wall of the first limiting block is symmetrically fixedly connected to the second limiting block, and the inner wall of the first limiting groove is symmetrically provided with the second limiting groove corresponding to the second limiting block. The outer wall of the second limiting block and the inner wall of the second limiting groove are in contact and slide together.

[0012] Preferably, the elastic blocking component includes; The pressure block has symmetrically formed grooves on its four extended ends. A spring is fixedly connected to the inner wall of the groove, and a resistance column is fixedly connected to the other end of the spring. The outer wall of the resistance column slides against the inner wall of the groove. The outer wall of the slide rod has a resistance hole corresponding to the resistance column. The two resistance columns have a frustum-shaped end that is close to each other.

[0013] Preferably, the resistance column forms an elastic telescopic structure with a spring and a groove, and the frustum end of the resistance column is pressed by the spring onto the inner wall of the resistance hole.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. When visually inspecting seals for defects, this device uses four conical transverse blocks to form an outwardly expanding conical column. After the seal body is fitted onto the outside of the conical transverse block assembly, seals of different inner diameters will automatically slide down the conical surface to an axial height position matching their own inner diameter under the action of gravity or pre-tightening force. A single conical assembly can accommodate a wide range of seal sizes, achieving adaptive matching of the seal inner diameter, thereby ensuring the applicability of the device for visual inspection.

[0015] 2. When visually inspecting seals for defects, an electric push rod can be used to raise the lifting block. During the inspection process, the rising of the lifting block causes four transverse blocks to move outward, resulting in elastic expansion of the outer seal body. Cracks on the seal are more clearly exposed due to elastic deformation and captured by the inspection camera. This effectively breaks the elastic contraction force of the seal, promotes the opening of cracks, and makes the cracks more visible in the image, thus improving the accuracy of computer recognition.

[0016] 3. When visually inspecting the sealing ring for defects, the lifting rod can rotate the support plate synchronously during the expansion process through the cooperation of the protrusion and the spiral groove. This, in turn, rotates the sealing ring body synchronously, allowing all cracks in the circumference of the sealing ring to be exposed. A single inspection camera can complete the segment-by-segment scanning of the entire circumference of the sealing ring body in a fixed position, thus ensuring the visual inspection efficiency of this device.

[0017] 4. When performing visual inspection of defects in the sealing ring, to ensure the comprehensiveness of the inspection process, as the conical transverse block moves radially outward, the inner ring of the sealing ring will have an upward climbing tendency along the conical surface. The setting of the pressure block can hinder the upward movement of the sealing ring body, ensuring its horizontal position stability during rotational expansion and preventing image blurring caused by jumping during rotation. Simultaneously, through the cooperation of the resistance column and the resistance hole, the gradually increasing upward climbing force of the sealing ring body during expansion overcomes the obstruction of the resistance hole on the resistance column, allowing the sealing ring body to drive the pressure block upward by one hole distance. This causes the sealing ring body to roll and be re-restrained, achieving a small-angle rolling surface change, thus ensuring the comprehensiveness of the visual inspection of this device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial structural diagram of the present invention; Figure 3 This is a schematic diagram showing the connection relationship between the transverse block and the support disk of the present invention; Figure 4 This is a structural schematic diagram showing the connection relationship between the lifting rod and the support plate of the present invention; Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A; Figure 6 This is a schematic diagram showing the installation positions of the pressure block and the sealing ring body of the present invention; Figure 7 This is a structural schematic diagram showing the connection relationship between the pressure block and the sliding rod of the present invention.

[0019] In the diagram: 1. Testing platform; 2. Slide rail; 3. Testing camera; 4. Support plate; 7. Sealing ring body; 5. Horizontal expansion component; 501. Transverse block; 502. Conical arc surface; 503. Conical inclined surface; 504. Lifting block; 505. Slide groove; 506. Through hole; 507. Lifting rod; 508. Vertical groove; 509. Spiral groove; 510. Protrusion; 511. Limiting groove one; 512. Limiting block one; 513. Limiting groove two; 514. Limiting block two; 6. Rolling surface changing component; 601. Slide rod; 602. Pressing block; 603. Groove; 604. Spring; 605. Resistance column; 606. Resistance hole. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1, please refer to Figures 1-7 The present invention provides a visual inspection device for defects in the industrial processing of sealing rings, including an inspection table 1, a slide rail 2 fixedly installed on the top of the inspection table 1, and an inspection camera 3 installed on the moving path of the slide rail 2. A support plate 4 is rotatably connected to the top of the inspection table 1.

[0022] A horizontal expansion component 5 is provided on the top of the support plate 4. The horizontal expansion component 5 includes four symmetrically arranged transverse blocks 501 on the top of the support plate 4. A sealing ring body 7 is sleeved on the outer side of the four transverse blocks 501. A conical arc surface 502 is provided on the side of the four transverse blocks 501 that is far apart, and a conical inclined surface 503 is provided on the side of the four transverse blocks 501 that is close to each other. A lifting block 504 is provided in the middle of the top of the support plate 4. A rising and rotating assembly is provided inside the support plate 4 so that when visual inspection of the sealing ring body 7 is performed, the transverse blocks 501 drive the sealing ring body 7 to perform an expanding and rotating motion through the rising and rotating assembly.

[0023] In this embodiment, during actual operation, the operator only needs to place the sealing ring body 7 to be tested directly onto the outside of the conical column composed of four transverse blocks 501. No manual adjustment or tooling change is required based on the specific specifications of the sealing ring. Since the outer surfaces of the four transverse blocks 501 are continuous conical arc surfaces 502, gradually thickening from top to bottom, when sealing rings of different inner diameters are fitted, their inner rings will naturally contact a certain height position on the conical arc surface 502. If the inner diameter of the sealing ring is large, it will continue to slide downwards along the conical surface until it slides down to a position where the diameter of the conical surface is just slightly larger than its inner diameter. At this point, the sealing ring relies on its own elastic contraction force and gravity... Maintaining stability, if the inner diameter of the sealing ring is small, it will remain at the higher position of the cone surface, allowing the same expansion mechanism to adapt to various sealing ring specifications from small to large inner diameters. This eliminates the need for frequent disassembly and replacement of expansion molds, greatly improving the production changeover efficiency of the inspection line. At the same time, the four transverse blocks 501 approach each other in the initial state, and the outer contour of the combined conical column has good roundness, ensuring that the sealing ring is subjected to uniform force when it is fitted, and will not be tilted or stuck due to local protrusions. After the operator places the sealing ring in place, the sealing ring will automatically slide down to the matching stable height within a few seconds by its own gravity. The whole process requires no additional assistance, making it both simple and reliable.

[0024] When the inspection camera 3 takes a picture of the sealing ring, the outer sealing ring body 7 is elastically expanded by the rising and rotating component. The cracks on the sealing ring can be more clearly exposed due to the elastic deformation and captured by the inspection camera 3. This effectively breaks the elastic contraction force of the sealing ring, promotes the opening of the cracks, and makes the cracks clearly visible in the image, which helps the computer to recognize them accurately. Moreover, the sealing ring body 7 can rotate automatically during the inspection process, so that all cracks in the circumference of the sealing ring can be exposed. This allows a single inspection camera 3 to complete the segmented scanning of the entire circumference of the sealing ring body 7 in a fixed position, thereby ensuring the visual inspection efficiency of this device.

[0025] After the sealing ring body 7 is stably placed on the conical arc surface 502 of the transverse block 501, the rising and rotating assembly begins to operate. First, there is a radial expansion action: the four transverse blocks 501 move smoothly outwards simultaneously, evenly expanding the sealing ring body 7 from the inside. This expansion action is slow and controllable. Although the sealing ring material has a certain degree of elasticity, during the continuous outward expansion, the tiny cracks that were originally tightly closed or semi-closed due to elastic contraction will have their edges relatively displaced as the overall circumference elongates. The cracks are thus significantly widened, and the opening width increases dramatically. At this point, the detection camera 3 located on one side can capture these "magnified" crack features with extremely high contrast. Even if the cracks were originally very fine, they will appear as clear dark lines or bright fracture zones in the image, greatly improving the recognition success rate and detection accuracy of the image processing algorithm. Next is the rotation action, where the sealing ring... While the ring remains in an expanded state, the rising and rotating component also drives the entire support plate 4, along with the four transverse blocks 501, to rotate slowly. The sealing ring body 7 also rotates synchronously. The detection camera 3 takes continuous pictures at a fixed frame rate at a fixed position, acquiring a partial image every time the ring rotates a certain angle. When the sealing ring has rotated a full circle, all surface images at all circumferential positions have been acquired. The subsequent computer vision system then stitches these partial images into a complete unfolded image of the sealing ring surface. Thus, without increasing the number of cameras or moving the cameras, it achieves a blind-angle detection of the entire circumference of the sealing ring. This combination of "expansion + rotation" motion mode enables various defects that are originally easy to miss and located at different circumferential angles and different diameter positions to be reliably detected and recorded.

[0026] Furthermore, the rising and rotating assembly includes: A through hole 506 is opened in the middle of the top of the support plate 4. A sliding groove 505 is opened on the side of the four horizontal moving blocks 501 that are close to each other, corresponding to the lifting block 504. The four extended ends of the lifting block 504 are respectively attached to the inner wall of the sliding groove 505. A lifting rod 507 is rotatably connected to the bottom center of the lifting block 504. The bottom of the lifting rod 507 extends through the inner wall of the through hole 506 to the inside of the testing table 1. An electric push rod is fixedly installed inside the testing table 1 corresponding to the lifting rod 507. The bottom of the lifting rod 507 is fixedly connected to the drive end of the electric push rod.

[0027] Specifically, after the sealing ring body 7 is placed, it can be fixedly connected to the lifting rod 507 by an electric push rod, so that the lifting rod 507 can be slowly raised, and then the lifting block 504 located at the top of the lifting rod 507 can be raised simultaneously. At this time, a sliding groove 505 is opened on the side of the four horizontal moving blocks 501 that are close to each other, corresponding to the lifting block 504. The four extended ends of the lifting block 504 are respectively attached to the inner wall of the sliding groove 505. So when the lifting block 504 rises, the four horizontal moving blocks 501 can be squeezed by the conical inclined surface 503, causing the four horizontal moving blocks 501 to move outward, so that the sealing ring body 7 located on the outside can elastically expand, which is convenient for the detection camera 3 to take pictures and detect.

[0028] Furthermore, vertical grooves 508 are provided at equal intervals on the outer wall of the lifting rod 507, and spiral grooves 509 are provided at equal intervals on the outer wall of the lifting rod 507. The vertical grooves 508 and spiral grooves 509 are staggered, and the inner walls of the vertical grooves 508 and spiral grooves 509 are connected and matched.

[0029] The inner wall of the through hole 506 is fixedly connected to a protrusion 510, and the outer wall of the protrusion 510 is in contact with and slides against the inner wall of the spiral groove 509.

[0030] Specifically, when the lifting rod 507 rises, a protrusion 510 is fixedly connected to the inner wall of the through hole 506, and the outer wall of the protrusion 510 slides and matches the inner wall of the spiral groove 509. Thus, the support plate 4 can rotate through the cooperation of the protrusion 510 and the spiral groove 509, which in turn drives the four transverse blocks 501 to move in a circle, so that the sealing ring body 7 can rotate and follow. Furthermore, the vertical groove 508 is set so that the rotation is intermittent during the continuous expansion process, and there is a time when only the expansion movement is performed, so as to realize the subsequent face-changing operation.

[0031] Furthermore, the bottoms of the four transverse blocks 501 are all slidably mounted on the top surface of the support plate 4. The bottoms of the four transverse blocks 501 are respectively fixedly connected to the limit blocks 512. The top of the support plate 4 is respectively provided with limit grooves 511 corresponding to the limit blocks 512. The outer wall of the limit blocks 512 is slidably mounted on the inner wall of the limit grooves 511.

[0032] Limiting block 1 512 is symmetrically fixedly connected to limiting block 2 514 on its outer wall. Limiting groove 1 511 is symmetrically provided with limiting groove 2 513 corresponding to limiting block 2 514 on its inner wall. The outer wall of limiting block 2 514 and the inner wall of limiting groove 2 513 slide together in contact.

[0033] Specifically, the bottoms of four transverse blocks 501 are all slidably attached to the top surface of the support plate 4. The bottoms of the four transverse blocks 501 are respectively fixedly connected to limit blocks 1 512. The top of the support plate 4 is respectively provided with limit grooves 1 511 corresponding to limit blocks 1 512. The outer wall of limit blocks 1 512 slides in contact with the inner wall of limit grooves 1 511. Thus, when the support plate 4 rotates, the four transverse blocks 501 can move in a circle through the cooperation of limit blocks 1 512 and limit grooves 1 511. At the same time, limit blocks 2 514 are symmetrically fixedly connected to the outer wall of limit blocks 1 512. The inner wall of limit grooves 1 511 is symmetrically provided with limit grooves 2 513 corresponding to limit blocks 2 514. The outer wall of limit blocks 2 514 slides in contact with the inner wall of limit grooves 2 513. Thus, the stability of the transverse blocks 501 during the transverse movement is ensured through the cooperation of limit grooves 2 513 and limit blocks 2 514.

[0034] In embodiment two, based on the above embodiment, a rolling face-changing component 6 is provided on the top of the support plate 4. The rolling face-changing component 6 includes four slide rods 601 symmetrically fixedly connected to the top of the support plate 4. The outer walls of the four slide rods 601 are slidably connected to a pressure block 602. An elastic blocking component is provided inside the pressure block 602 so that when visual inspection of the sealing ring body 7 is performed, the pressure block 602 can cause the sealing ring body 7 to intermittently change face through the elastic blocking component.

[0035] In this embodiment, to ensure comprehensiveness during the inspection process, since the inner ring of the sealing ring body 7 tends to climb upward along the conical surface when the conical transverse block 501 moves radially outward, causing instability such as jumping during expansion and rotation, after placing the sealing ring body 7, the pressure block 602 is placed at the top of the sealing ring body 7 and passes through the four slide bars 601. This restricts the horizontal position of the sealing ring body 7 during the inspection process, ensuring the stability of visual inspection when the sealing ring body 7 rotates. During expansion, the gradually increasing upward climbing force of the sealing ring body 7 enables the sealing ring body 7 to drive the pressure block 602 to move upward, achieving a small-angle rolling surface change, thereby ensuring the comprehensiveness of the visual inspection of this device.

[0036] Furthermore, the resilient blocking component includes: The pressure block 602 has symmetrically opened grooves 603 inside its four extended ends. A spring 604 is fixedly connected to the inner wall of the groove 603, and a resistance column 605 is fixedly connected to the other end of the spring 604. The outer wall of the resistance column 605 slides against the inner wall of the groove 603. A resistance hole 606 is opened on the outer wall of the slide rod 601 corresponding to the resistance column 605. The ends of the two resistance columns 605 that are close to each other are truncated cone-shaped.

[0037] The resistance column 605 forms an elastic telescopic structure with the groove 603 via the spring 604, and the frustum end of the resistance column 605 is pressed against the inner wall of the resistance hole 606 by the spring 604.

[0038] Specifically, after the pressure block 602 is placed on top of the sealing ring body 7 and passes through the four sliding rods 601, the resistance column 605, through the spring 604 and the groove 603, forms an elastic telescopic structure. The frustum end of the resistance column 605 is pressed against the inner wall of the resistance hole 606 by the spring 604, thereby hindering the upward force of the sealing ring body 7. This ensures the stability of its horizontal position during rotational expansion and prevents the sealing ring body 7 from jumping during rotation, which would cause motion blur. At the same time, through the cooperation of the resistance column 605 and the resistance hole 606, the climbing motion of the sealing ring body 7 can be controlled during expansion. The lifting force will exceed the resistance of the resistance column 605 and the resistance hole 606, allowing the sealing ring body 7 to roll upward on the surface of the conical arc surface 502 until the sealing ring body 7 can drive the pressure block 602 to move upward by one hole distance. At this time, due to the rise in the horizontal position of the sealing ring body 7, its climbing force will decrease accordingly. At this time, it will be restricted again by the resistance of the resistance column 605 and the resistance hole 606 to perform cyclic detection. During the expansion rotation, the shooting detection is performed at this time. After one rotation, it enters the expansion and face-changing stage. At this time, the detection camera 3 will rise synchronously under the control of the slide rail 2 to ensure the stability of the shooting angle.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A visual inspection device for defects in the industrial processing of sealing rings, comprising an inspection table (1), characterized in that: The top of the testing platform (1) is fixedly equipped with a slide rail (2), and a testing camera (3) is installed on the moving path of the slide rail (2). The top of the testing platform (1) is rotatably connected with a support plate (4). The top of the support plate (4) is provided with a horizontal expansion component (5), which includes four symmetrically arranged transverse blocks (501) on the top of the support plate (4). A sealing ring body (7) is sleeved on the outer side of the four transverse blocks (501). A conical arc surface (502) is opened on the side of the four transverse blocks (501) that are far apart, and a conical inclined surface (503) is opened on the side of the four transverse blocks (501) that are close together. A lifting block (504) is provided in the middle of the top of the support plate (4). A rising and rotating assembly is provided inside the support plate (4) so ​​that when the sealing ring body (7) is visually inspected, the transverse blocks (501) drive the sealing ring body (7) to expand and rotate through the rising and rotating assembly. The top of the support plate (4) is provided with a rolling face-changing component (6). The rolling face-changing component (6) includes four slide rods (601) symmetrically fixedly connected to the top of the support plate (4). The outer walls of the four slide rods (601) are slidably connected to a pressure block (602). The pressure block (602) is provided with an elastic blocking component inside, so that when visual inspection of the sealing ring body (7) is performed, the pressure block (602) causes the sealing ring body (7) to intermittently change face through the elastic blocking component.

2. The visual inspection device for defects in the industrial processing of sealing rings according to claim 1, characterized in that, The rising and rotating assembly includes: A through hole (506) is opened in the middle of the top of the support plate (4). A sliding groove (505) is opened on the side of the four horizontal moving blocks (501) that are close to each other, corresponding to the lifting block (504). The four extended ends of the lifting block (504) are respectively attached to the inner wall of the sliding groove (505). A lifting rod (507) is rotatably connected to the bottom center of the lifting block (504). The bottom of the lifting rod (507) extends through the inner wall of the through hole (506) to the inside of the testing table (1). An electric push rod is fixedly installed inside the testing table (1) corresponding to the lifting rod (507). The bottom of the lifting rod (507) is fixedly connected to the driving end of the electric push rod.

3. The visual inspection device for defects in the industrial processing of sealing rings according to claim 2, characterized in that, The outer wall of the lifting rod (507) is provided with vertical grooves (508) at equal intervals, and the outer wall of the lifting rod (507) is provided with spiral grooves (509) at equal intervals. The vertical grooves (508) and the spiral grooves (509) are staggered, and the inner walls of the vertical grooves (508) and the spiral grooves (509) are connected and matched.

4. The visual inspection device for defects in industrial processing of sealing rings according to claim 3, characterized in that, The inner wall of the through hole (506) is fixedly connected to a protrusion (510), and the outer wall of the protrusion (510) is in contact with and slides against the inner wall of the spiral groove (509).

5. The visual inspection device for defects in industrial processing of sealing rings according to claim 1, characterized in that, The bottoms of the four transverse blocks (501) are all slidably mounted on the top surface of the support plate (4). The bottoms of the four transverse blocks (501) are respectively fixedly connected to the first limiting block (512). The top of the support plate (4) is respectively provided with the first limiting block (512) and the first limiting groove (511). The outer wall of the first limiting block (512) is slidably mounted on the inner wall of the first limiting groove (511).

6. The visual inspection device for defects in industrial processing of sealing rings according to claim 5, characterized in that, The outer wall of the first limiting block (512) is symmetrically fixedly connected to the second limiting block (514), and the inner wall of the first limiting groove (511) is symmetrically opened with the second limiting groove (513) corresponding to the second limiting block (514). The outer wall of the second limiting block (514) and the inner wall of the second limiting groove (513) slide together.

7. A visual inspection device for defects in the industrial processing of sealing rings according to any one of claims 1-6, characterized in that, The elastic barrier component includes; The pressure block (602) has four symmetrically opened grooves (603) inside its four extended ends. A spring (604) is fixedly connected to the inner wall of the groove (603), and a resistance column (605) is fixedly connected to the other end of the spring (604). The outer wall of the resistance column (605) slides against the inner wall of the groove (603). The outer wall of the slide rod (601) is provided with a resistance hole (606) corresponding to the resistance column (605). The ends of the two resistance columns (605) that are close to each other are truncated cone-shaped.

8. The visual inspection device for defects in industrial processing of sealing rings according to claim 7, characterized in that, The resistance column (605) forms an elastic telescopic structure with the spring (604) and the groove (603), and the frustum end of the resistance column (605) is pressed and set on the inner wall of the resistance hole (606) by the spring (604).

Images